Toyota 4Runner: Problem Symptoms Table
PROBLEM SYMPTOMS TABLE
HINT:
- Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are listed in order of probability in the "Suspected Area" column of the table. Check each symptom by checking the suspected areas in the order they are listed. Replace parts as necessary.
- Inspect the fuses and relays related to this system before inspecting the suspected areas below.
|
Symptom |
Suspected Area |
See page |
|---|---|---|
|
No Door Lock/Unlock Functions Operate Via Master Switch or Driver Side Door Key Cylinder |
Proceed to "All Doors LOCK/UNLOCK Functions Operate Via Master Switch or Driver Side Door Key Cylinder" |
|
|
Only Driver Door Lock/Unlock Functions do not Operate |
Front door lock assembly LH |
|
|
Harness or connector |
- |
|
|
Main body ECU (Multiplex network body ECU) |
- |
|
|
Driver side junction block assembly |
- |
|
|
Only Passenger Door Lock/Unlock Functions do not Operate |
Front door lock assembly RH |
|
|
Harness or connector |
- |
|
|
Main body ECU (Multiplex network body ECU) |
- |
|
|
Driver side junction block assembly |
- |
|
|
Only Rear Door LH Lock/Unlock Functions do not Operate |
Rear door lock assembly LH |
|
|
Harness or connector |
- |
|
|
Main body ECU (Multiplex network body ECU) |
- |
|
|
Driver side junction block assembly |
- |
|
|
Only Rear Door RH Lock/Unlock Functions do not Operate |
Rear door lock assembly RH |
|
|
Harness or connector |
- |
|
|
Main body ECU (Multiplex network body ECU) |
- |
|
|
Driver side junction block assembly |
- |
|
|
Only Back Door cannot be Operated |
Proceed to "Only Back Door cannot be Operated" |
|
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Initialization
INITIALIZATION
1. PROCEDURES NECESSARY WHEN CABLE IS DISCONNECTED/RECONNECTED TO BATTERY TERMINAL
NOTICE:
After the battery is reconnected, be sure to wait 10 seconds or more
before att ...
Terminals Of Ecu
TERMINALS OF ECU
1. CHECK DRIVER SIDE JUNCTION BLOCK ASSEMBLY AND MAIN BODY ECU (MULTIPLEX NETWORK
BODY ECU)
(a) Remove the main body ECU (multiplex network body ECU) (See page
).
(b) Measure ...
Other materials about Toyota 4Runner:
Diagnosis System
DIAGNOSIS SYSTEM
1. SYMPTOM SIMULATION
HINT:
The most difficult case in troubleshooting is when no problem symptoms occur.
In such a case, a thorough problem analysis must be carried out. A simulation of
the same or similar conditions and environment in ...
System Diagram
SYSTEM DIAGRAM
Communication Table
Sender
Receiver
Signal
Line
ECM
Skid control ECU
Engine speed signal
Accelerator pedal position signal
Intak ...
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